Dichloromethane → HCID 69357284, compound

Participants

Reaction Steps

To a solution of 3-methylamino-5-(2-oxo-pyrrolidin-1-yl)-benzoic acid tert-butyl ester (B32) (200 mg, 0.69 mmol, 1 equiv) in CH2Cl2 (5 ml) was added NEt3 (278 μl, 2 mmol, 2.9 equiv) and acetic anhydride (195 μl, 2 mmol, 2.9 equiv). The resulting mixture was stirred at room temperature for 16 h, diluted with CH2Cl2, washed with saturated aqueous NaHCO3 solution, dried over MgSO4 and concentrated in vacuo to give (acetyl-methyl-amino)-(ethyl-propionyl-amino)-benzoic acid tert-butyl ester (B47) (203 mg, 89%) as a pale yellow oil which was used in the next step without further purification. [M+H]+=333.1 RT=2.76 min

Provenance & Evidence